Question

A 100 m long antenna is mounted on a 500 m tall building. The complex can become a transmission tower for waves with $\lambda$ :

• A. $\sim$ 400 m
• B. $\sim$ 425 m
• C. $\sim$ 150 m
• D. $\sim$ 2400 m

Answer 1

The correct option is A $\sim$ 400 m

Given,

Length of building, $l=500m$

Length of antenna, $100m$

The wavelength of wave which can be transmitted by

$\lambda =4l$

$\lambda =4\times 100$

$\lambda =400m$